• 아동학회지
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• 제22권4호
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• pp.257-269
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• 2001

This study identified and explained the prototypes of teacher's belief about children's play with the use of Stephenson's Q-methodology. The sample consisted of 35 kindergarten teachers. A Q-deck composed of 48 cards, derived in part from a review of related literature and was developed by the researchers and sorted by the subjects. The obtained Q-sort scores were analyzed by factor analysis. The findings revealed that the subjects were divided into 3 belief types : "life-experienced", "developmental-disciplinary", "cultural-environmental". Likely explanations for these results are considered, and implications are discussed.

• 아동학회지
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• 제28권4호
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• pp.1-17
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• 2007

Participants in this study on links between toddlers' compliance and variables were 97 toddlers and their mothers. Instruments were the Toddler Behavior Assessment Questionnaire (Goldsmith, 1988) and the Child Rearing Practice Report-Q Sort (Block, 1981). Toddlers' compliance was observed on clean-up and behavior-delay tasks. Data analysis was by logistic and regression analyses. Results on the clean-up task indicated lower compliance by difficult children and higher compliance by girls. On the behavior-delay task, boys with less difficult temperament showed higher compliance by mother's higher punishment attitudes, whereas highly difficult boys were more compliant by mother's lower punishment attitudes. Girls' compliance was higher than boys in the low inhibition group whereas boys' compliance was higher than girls in the high inhibition group.

• 한국지반공학회:학술대회논문집
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• 한국지반공학회 2005년도 춘계 학술발표회 논문집
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• pp.765-776
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• 2005

As a result of industrial advancement and land development, a number of highway slopes have been gradually formed and numerous problems related to their stability have been frequently caused. Generally, major factors for rock slope stability are lithology, slope inclination, slope height, degree of weathering, precipitation, condition of groundwater and so onl. Many complex factors are mostly involved in the collapse of rock slopes. In this study, a database for 94 collapsed Jungang highway slopes were set up using GIS program through literature search, site investigation, geological map and Korea tectonic province map. The analyses for the collapsed factor including sort of rock(by origin), tectonic province, highway direction, slope gradient and direction, degree of weathering, slope height were carried.

• KIEAE Journal
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• 제5권4호
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• pp.59-64
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• 2005

This work was designed for the Green Fund Aid 2004 of Korea Forest Service. It won the prize and has been constructed. We can have an opportunity to play a leading role in improving partnership with participation of local communities, promoting environmental education, and enhancing the environmental quality by constructing biotops in urban areas where energy flow in the ecosystem is not balanced. This design includes 'citizen participation process' and 'local community partnership' that is expected to promote local community participation in the process of design. This work suggests that biotope construction with citizen involvement and community partnership plays an important role not only in design items but also in the revitalization of local community. This sort of design process could not be fully achieved without cooperation with stakeholders - environmental specialists, local authorities, relevant societies, schools, teachers, parents of students.

• KIEAE Journal
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• 제4권3호
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• pp.27-35
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• 2004

The conventional way to acquire sufficient amount of daylight in interiors is to provide large openings with clear glass. The use of clear glass on the whole facade, however, might cause a sort of visual problem because of the harness of direct sun and brighter sky surface than expected. They should be filtered in opticalway or bounced in the architectural. One of the common solutions for the problem might be the use of photometric glasses with various transmittances for the glass walls. This paper deals with performance data related to the impact of various transmittal glazing materials for window systems in terms of daylighting. A series of scale model measurements was carried out with the fundamental configuration of a commonly used all-glass facades. Additionally some experimental performance index was issued for the better expression of the need of natural lighting.

• 대한전기학회:학술대회논문집
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• 대한전기학회 1989년도 하계종합학술대회 논문집
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• pp.333-334
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• 1989

Electrically active part of the piezoelectric sound element is a ceramic thin circular disk cemented to a metal base plate (using a type of thermosetting epoxy). The active part is a thin lead zirconate titanate disk (PZT). The piezoelectric sound element is so dimensioned that its basic resonance frequency is approximately if the center of the audible frequency band: This frequency is mainly determined by the geometry and the sort of the metal base plate materials. In this study, four kinds of PZT ceramic and two classes of thin metal base plate were prepared. It is observed that dielectric and pizoelectric properties relate to acoustical properties (particularly sound pressure level).

• 한국통신학회논문지
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• 제18권1호
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• pp.47-56
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• 1993

본 연구는 인간시각을 기반으로 하는 DCT분류기를 사용하여 영상의 계층적 VQ부호화를 시도하였다. 제안된 인간시각기반 DCT분류기에서는 전 변환블록에 대영통과필터인 MTF을 곱하여 가중치를 두고, 전 블록들의 DCT계수의 ac 에너지 크기를 구하여, 크기순서대로 나영하여, 문턱치를 이요 여 높은분산블록들을 얻어낸 다음 이블록들에 대해서 에지방향 성분이 뚜렷한 계수들의 에너지합을 비교하여 최대 에너지를 갖는 방향을 그 에지의 방향으로 한다.향으로 한다.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2001년도 하계학술대회 논문집 C
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• pp.1756-1758
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• 2001

Recently, ozone is utilized in various fields and its needs are expanding. In this paper, fluorescent discharge type ozonizer has been designed and manufactured. Ozone discharge and generation characteristics have been investigated in accordance with a sort of internal electrodes, output voltage of power supply. flow rate and discharge power. Air has been used as the supplied gas of the ozonizer.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2000년도 추계학술대회 논문집 학회본부 A
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• pp.52-54
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• 2000

In PV power generation system study, huge system apparatuses are needed in order to verify the effect of system efficiency and stability considering the size of solar panels, the sort of converter types, and the load conditions and so on. And also, under the same weather and load conditions it is impossible to compare a certain MPPT control scheme to others. In this paper, in order to obtain effective solutions for the above mentioned topics, the solar cell array is simulated with it's VI characteristic equations, and the real field data of weather conditions is interfaced to EMTDC using Fortran program interface method. Consequently the simulation of PV power generation system using field data is realized in this paper, and acceptable results, which show close match between the real data of PV panel and the simulated data, were obtained.

• 한국전기전자재료학회:학술대회논문집
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• 한국전기전자재료학회 2000년도 영호남학술대회 논문집
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• pp.70-73
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• 2000

This paper present a new sort of multilayer piezoelectric ceramic transformer for AC-adapter. This piezoelectric transformer operates in the second longitudinal vibration mode. The output voltage of the multilayer piezoelectric transformer was simulated using ANSYS, that is one of the FEM analysis program. As results, the minimum displacement was occurred at the two paints where one is the middle of input and the other is middle of output side in second thickness extensional vibration mode. And output voltage was inversely decreased by increasing number of output layers. 缀Ѐ㘰〻ሀ䝥湥牡氠瑥捨湯汯杹